Bump opencv-python-headless from 4.5.4.58 to 4.5.4.60

Bumps [opencv-python-headless](https://github.com/skvark/opencv-python) from 4.5.4.58 to 4.5.4.60.
- [Release notes](https://github.com/skvark/opencv-python/releases)
- [Commits](https://github.com/skvark/opencv-python/commits)

---
updated-dependencies:
- dependency-name: opencv-python-headless
dependency-type: direct:production
update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -2,7 +2,7 @@ aiortc==1.2.1
 av==8.0.3
 matplotlib==3.4.3
 numpy==1.21.3
-opencv-python-headless==4.5.4.58
+opencv-python-headless==4.5.4.60
 pydub==0.25.1
 streamlit==1.1.0
 streamlit_webrtc==0.31.5